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run code in 200+ php & hhvm versions
Bugs & Features
<?php function array_flatten_iterator (array $array) { foreach ($array as $value) { if (is_array($value)) { yield from array_flatten_iterator($value); } else { yield $value; } } } function array_flatten (array $array) { return iterator_to_array(array_flatten_iterator($array), false); } $array = [ 1, 2, [ 3, 4, 5, [ 6, 7 ], 8, 9, ], 10, 11, ]; var_dump(array_flatten($array));
based on GNERJ
Output for 7.0.0 - 7.2.6
array(11) { [0]=> int(1) [1]=> int(2) [2]=> int(3) [3]=> int(4) [4]=> int(5) [5]=> int(6) [6]=> int(7) [7]=> int(8) [8]=> int(9) [9]=> int(10) [10]=> int(11) }
Output for 5.5.0 - 5.6.28
Parse error: syntax error, unexpected 'array_flatten_iterator' (T_STRING) in /in/RU30W on line 6
Process exited with code 255.
Output for 5.4.0 - 5.4.45
Parse error: syntax error, unexpected 'from' (T_STRING) in /in/RU30W on line 6
Process exited with code 255.
Output for 5.1.0 - 5.3.29
Parse error: syntax error, unexpected T_STRING in /in/RU30W on line 6
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_ARRAY, expecting '&' or T_VARIABLE in /in/RU30W on line 3
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_ARRAY, expecting ')' in /in/RU30W on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected T_ARRAY, expecting ')' in /in/RU30W on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/RU30W on line 3
Process exited with code 255.